JSON → JSON Schema

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Generate a JSON Schema from example JSON. Supports objects, arrays, nested structures, and optional required fields.

Example JSON

Mark properties as required additionalProperties: false

Paste this schema into validators or OpenAPI definitions. Adjust formats (email, uri) as needed.

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Generated locally in your browser. No data is sent to any server.

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update v1.0

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Paste example JSON and click Generate Schema.

Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.